We have build this landing page on top of Zurb Foundation Framework. You can take a look here http://foundation.zurb.com/old-docs/f3/components.php and see it's awesome features in action.
The grid is built around two key elements: rows and columns. Rows create a max-width and contain the columns; columns create the actual structure. For layouts to work properly, always put your page content inside a row and a column.
A basic layout of the grids look like:
You can also view an online example of how the grid system works http://foundation.zurb.com/old-docs/f3/grid.php
